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Environmental Health Sciences Center Community Outreach & Education Program

What Should I Use to Clean My Shower?

S

TUDENT

H

ANDOUT

1:

Criteria for Evaluation

Toxicological Factors

Threshold (aka. LOEL): The threshold of effectiveness is the dose along a dose-response curve where you begin to observe an effect on the study organism. In toxicology, this point is known as the LOEL (Lowest Observable Effect Level). Mark this on your dose-response curve. **Note: Use the LOEL values from Mold Control! experiment.

LD

100

(Lethal Dose 100%): There is also a specific dose at which the effect does not increase, despite increasing dose. This is the point along a dose-response curve where all of the test population is killed or you observe 100% death. This is called the LD

100

(lethal dose 100%), and is the lowest dose that kills 100% of the yeast colonies. **Note: Use the LD

100

values

from Mold Control! experiment.

LD

50

(Lethal Dose 50%): Toxicologists use the LD

50 different chemicals. LD

50 value to compare the toxicities of

is the dose at which 50% of the test population is killed. **Note:

Use the LD

50

values from Mold Control! experiment.

Pesticide Signal Words: Pesticides are defined as chemicals used to prevent, destroy, or repel pests: insect, mice, weeds, fungi, and bacteria. Pesticides also include household products, such as disinfectants or cleaners that are used to destroy the growth of harmful bacteria, viruses, or fungi on household surfaces. The Environmental Protection Agency

(EPA) registers and regulates pesticides under the Federal Insecticide, Fungicide and

Rodenticide Act (FIFRA). These products must meet some basic standards: (1) the product will not cause harmful effects to human health or the environment and (2) that product labeling must meet FIFRA requirements.

The signal words used on pesticide labels are based on the degree of toxicity or how poisonous the product is, and use the oral Lethal Dose 50 (LD signal words are determined for use on pesticide labels.

50

) of the substance, expressed in milligrams of chemical per kilogram of body weight (mg/kg). Table 1 indicates how

Note**: If there is no signal word on a product, then it is not hazardous.

Table 1. FIFRA Signal Words and Toxicity Rating Scale for Rats

Signal Words Toxicity

Oral LD

50

(mg/kg)

DANGER-POISON

DANGER

WARNING

CAUTION

highly toxic highly toxic/corrosive moderately toxic slightly toxic

0 - 50

0 - 50

50 - 500

500 - 5,000

Examples

indoor/outdoor insect killer toilet bowl cleaner flea spray rat killer, ethanol

M

YSTERIOUS

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UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

Funded by NIEHS grant #1

R25 ES10721

Environmental Health Sciences Center Community Outreach & Education Program

Safety Instructions: Besides signal words, product labels contain other important information, such as instructions for safe handling, use, and storage; active ingredients; and first aid safety. As a consumer, make it a habit to read all label information before using any product. Does this product require special equipment like gloves, eye protection, or ventilation? **Note: Gather safety instructions from the product labels.

Product Marketing

Product Appeal: Household cleaning products often have odors which make them unappealing or fragrances that be either appealing or unappealing to certain people. Is this product pleasing to you?

Cost: What is the price of each product? Is this product worth the price for the job it will do for you?

Non-damaging to surfaces: Some household cleaning products are not made to clean certain types of surfaces. Is this product compatible with the surface of your shower? Is the product safe for “non-scratch” surfaces?

Ease of use: Is this product difficult to use? Do you need to mix or dilute it before you use it?

Synthetic vs. Natural Chemicals: We manufacture a wide variety of synthetic chemicals found in products such as cleaners, deodorants, food additives, and pesticides. A common misconception is that all chemicals produced by nature are safe and whereas synthetic chemicals are harmful and exposure to synthetic chemicals will in all cases cause adverse health effect like cancer. While it is true that some synthetic chemicals are highly toxic to humans, it is also true that many synthetic chemicals are harmless when used as directed by product labeling.

Other Issues:

Product Endorsement: Antimicrobial pesticides, biocides, or detergents may or may not be endorsed to control or kill mold by agencies such as the U.S. Environmental Protection

Agency or American Lung Association.

1. U.S. Environmental Protection Agency. A Brief Guide to Mold, Moisture, and Your Home.

Section Entitled “Cleanup and Biocides”. www.epa.gov/iaq/molds/moldguide.html

2. American Lung Association. www.lungusa.org/

Individual Susceptibility: Humans can have differences in their reactions to certain household chemicals after the same amount of exposure. A person’s body size, age, gender, race and health status (for example, whether someone has allergies, asthma or chemical sensitivities) can affect individual susceptibility. You might need to consider whether

using household chemicals to control mold might exacerbate other health symptoms in susceptible individuals.

M

YSTERIOUS

I

LLNESS

O

UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

2

Environmental Health Sciences Center Community Outreach & Education Program

P

ESTICIDE

L

ABELS FOR

M

OLD

C

ONTROL

:

LYSOL® DISINFECTANT – Antibacterial Kitchen Cleaner

FRONT LABEL

BACK LABEL

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YSTERIOUS

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LLNESS

O

UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

3

Environmental Health Sciences Center

P

ESTICIDE

L

ABELS FOR

M

OLD

C

ONTROL

:

HEINZ® - Vinegar

Community Outreach & Education Program

Heinz Distilled White Vinegar is made from sun-ripened grain and crystal clear water. With its clean, crisp flavor, it’s ideal for your favorite marinades, salads and recipes. And Heinz

Distilled White Vinegar is guaranteed to have the full 5% activity required for successful canning and pickling.

INGREDIENTS:

Made from select sunripened grain diluted with water to a uniform pickling and table strength of 5%

(50 grains) acidity.

M

YSTERIOUS

I

LLNESS

O

UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

4

Environmental Health Sciences Center Community Outreach & Education Program

TILEX® – Mildew Remover

P

ESTICIDE

L

ABELS FOR

M

OLD

C

ONTROL

:

FRONT LABEL

BACK LABEL

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YSTERIOUS

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LLNESS

O

UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

5

Environmental Health Sciences Center Community Outreach & Education Program

Name ____________________________________

S

TUDENT

W

ORKSHEET

1: H

OUSEHOLD

P

RODUCT

C

OMPARISON

I

NSTRUCTIONS

: Complete the product comparison chart using the following sources of information: (1) Descriptions in the student handout; (2) Data collected from Mold

Control! experiment and (3) Information from Reading Product Labels activity.

Product

Criteria

Tilex®

Lysol® Antibacterial

Kitchen Cleaner

Vinegar

Threshold (LOEL)

LD

100

LD

50

Toxicity

Signal Words

Safety Instructions

Product Appeal? Y/N

Cost

Non-damaging to

Surfaces? Y/N

Ease of Use

Synthetic vs. Natural

Product

Other:

Other:

M

YSTERIOUS

I

LLNESS

O

UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

6

Environmental Health Sciences Center Community Outreach & Education Program

Name

____________________________________

S

TUDENT

W

ORKSHEET

2: D

ECISION

A

NALYSIS

C

HART

I

NSTRUCTIONS

: You are going to use a decision analysis chart to decide what cleaning product to clean the mildew in your shower. You will rank the products using three criteria: (a)

Effectiveness, (b) Safety, and (c) Personal Preference. Consider each factor one at a time and rank each product using the scale below.

P

ROBLEM

S

TATEMENT

: W

HAT SHOULD I USE TO CLEAN THE MILDEW IN MY SHOWER

?

C

LEANING

P

RODUCT

O

PTIONS

D

ECISION

C

RITERIA

&

F

ACTORS

Tilex® Lysol® Vinegar

Other

Product:

Effectiveness: Based on each of the three factors listed below which product do you think is the most effective? 1 = Least Effective, 2 = Moderately Effective, 3 = Most Effective

Threshold (LOEL)

LD

100

LD

50

Safety: Based on each of the three factors listed below which product do you think is the most safe? 1 = Least Safe, 2 = Moderately Safe, 3 = Most Safe

Toxicity

Signal Words

Safety Instructions

Individual Preference: Based on each of the five factors listed below which product is the most appealing? 1 = Least Appealing, 2 = Moderately Appealing, 3 = Most Appealing

Product Appeal?

Cost

Non-damaging to

Surfaces?

Ease of Use

Synthetic vs. Natural

Other Criteria:

Factor #1:

Factor #2:

Total Product Score:

M

YSTERIOUS

I

LLNESS

O

UTBREAK

– What Should I Use to Clean My Shower?

HYDROVILLE CURRICULUM PROJECT

2004, Oregon State University http://www.ehsc.orst.edu/outreach.htm

7

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